How the Result is 120 ??? And why curly braces empty here???

Question

var x=1;
for(x; x<10;x++){}
x+=x+100;
document.write(x);
//Ans: 120

Answer 1

Because in the for loop you increment x 9 times, so x = 10 after the loop.

In the for loop, you do nothing except increment x 9 times.

x += x(which is 10 now) + 100
So x += 110
x = 120

Answer 2

Thanks